def flippedDisplay():
"""Flip the display so that the origin is the topLeft instead of the bottomLeft.
Restore the origin to bottomLeft when leaving the 'with' clause."""
canvas.save_gstate()
canvas.scale(1, -1)
canvas.translate(0, -screenHeight)
try:
yield None
finally:
canvas.restore_gstate()
def drawMinorTickmarks(): for i in range(60): canvas.save_gstate() canvas.translate(centerX, centerY) canvas.rotate(-2 * pi / 60.0 * i) canvas.set_fill_color(0.4, 0.4, 0.4, 0.6) width = 1 height = 5 canvas.set_line_width(1) canvas.draw_rect(-width/2, clockWidth * 0.505, width, height) canvas.restore_gstate()
def drawNumbers2(): for i in range(12): canvas.save_gstate() canvas.translate(centerX, centerY) canvas.rotate(-2 * pi / 12.0 * i) canvas.set_fill_color(0.3, 0.3, 0.3, 0.6) fontSize = 30 fontName = 'Helvetica-Bold' number = str(12 if i == 0 else i) width, height = canvas.get_text_size(number, fontName, fontSize) canvas.draw_text(number, -width/2, 115, fontName, fontSize) canvas.restore_gstate()
for i in range(40, 460, 20):
x = i + 5
y = originY - 5
canvas.fill_rect(x, y, 10, 10)
for i in range(40, 460, 20):
x = originX - 5
y = i + 5
canvas.fill_rect(x, y, 10, 10)
canvas.set_fill_color(0.5, 0, 0, 0.5)
for i in range(12):
canvas.save_gstate()
canvas.set_fill_color(0.4, 0.4, 0.8, 0.4)
canvas.translate(250, 250)
canvas.rotate(-2 * pi / 12.0 * i)
canvas.fill_rect(0, 0, 120, 120)
canvas.restore_gstate()
canvas.begin_updates()
for i in range(12):
canvas.save_gstate()
canvas.translate(250, 250)
canvas.rotate(-2 * pi / 12.0 * i)
for j in range(0, 80):
randomIntX = random.randrange(0, 160)
randomIntY = random.randrange(0, 160)
randomColor = random.random()
x = randomIntX
y = randomIntY
for i in range(53):
x = randint(0, winwidth)
y = randint(0, winheight)
canvas.fill_pixel(x, y)
# use MKS units: meter, kg, sec
# use average Earth-Moon distance for view scaling
moondistance = 3.84399e8
# set up initial conditions in our simulated universe
# Earth at center origin
earthrad = 6.3781e6
earthx = 0.0
earthy = 0.0
canvas.translate(winwidth / 2.0, winheight / 2.0) # earth at center of view
winmin = min(winwidth, winheight)
winmax = max(winwidth, winheight)
viewscale = winmin / (3.0 * moondistance * inz.winscale) # pixels/meter
canvas.scale(viewscale, viewscale)
apixel = 0.4 / viewscale # to plot pixels as ship moves
offscreen = winmax / viewscale # meters to be out of view
# RGB colorsets for Earth and Moon
er, eg, eb = 0.2, 0.2, 1.0 # the blue-ish Earth
mr, mg, mb = 0.6, 0.6, 0.4 # the grey-ish Moon
def show_earth(er, eg, eb):
canvas.save_gstate()